That awkward moment when the server brings an extra-tall wineglass for you, a tulip-shaped one for your dining partner, and narrow ones to the next table.

It makes you wonder if you’ve been doing it wrong all along.

Why do wineglasses come in so many styles? How do you know which kind to use? Does it really make a difference?

“The world of wineglasses can seem intimidating,” acknowledges Gabe Geller, a top sommelier and director of public relations for Royal Wine.

“The varieties are endless. The truth is, it can be as simple or as complex as you want it to be.”

Royal Wine gives tips to demystify the wineglass so people can spend more time enjoying their wine — and less time worrying about the vessel.

Red, white, rosé, sparkling or dessert wine?

It’s all about physics, says Geller.

“The bowl of the glass is designed with surface area in mind. Red wines generally need to breathe, so a fuller, rounder bowl with a wide opening suits them best. Whites stay cooler in bowls that are straighter on the sides.”

Rosés can be served in white wineglasses because the two are produced similarly. But, says Geller, there are glasses made specifically for rosés. They have shorter bowls that are slightly tapered and sometimes have a flared rim.

“The rim affects the way you sip,” he explains. “The flare helps direct the wine directly to the tip of the tongue.”

Tall, narrow glasses, sometimes called flutes, capture the carbon dioxide in sparkling wines, keeping the bubbly bubblier.

The smallest of them all is the dessert/fortified wine glass, designed to send the sweet sip directly to the back of the mouth.

Differences within the differences

Serious oenophiles may insist on subtle variations within the basic categories above.

A pinot noir, for example, would be served in a balloon-shaped glass, while its more rarefied red cousin, the grand cru, is best featured when sipped over a flared rim.

A wider mouth helps release the bold, acidic qualities of full-bodied whites like Herzog Lineage chardonnay, whereas a smaller mouth holds the delicate aromas of light whites like Teal Lake Sauvignon Blanc.

Glass or crystal?

In theory, crystal is preferable to glass. Geller says the biggest advantage to crystal is its mineral content, which makes it durable enough to produce very thin stemware. This allows for a smoother flow into the mouth, not to mention a clearer view of the wine’s color and viscosity.

But does it affect the taste? Some insist it does.

According to the website Wine Tasting Reviews, “The best explanation offered so far is that crystal is rougher than regular glass and this roughness creates turbulence in the wine which, in turn, causes more of the aromatic compounds in the wine to be released.”

But for most people, the main difference between crystal and glass is cost. Geller assures us it’s perfectly acceptable to serve wine in a regular glass made of glass — preferably one that’s clear, un-etched, and uncut to better see what’s inside. Again, it’s easier to enjoy your wine when you’re not worried about breaking your valuable crystal.

If you had to choose just one type of glass …

Many in the industry share a healthy skepticism when it comes to amassing a collection of “perfect” glasses for every type of wine on the market. Some even suspect it’s all a marketing ploy by upscale stemware manufacturers.

Geller agrees.

“There’s no reason to think you’ll ever be judged by your stemware,” he says, “and you don’t have to be a professional sommelier to choose the right glass.”

In fact, you can get by with one set (or two if you like to serve bubbly).

Geller recommends a thin glass with a large bowl that narrows at the top, ideally holding about 13 ounces of wine.

“A good universal wineglass is perfectly suitable for anything, from your summer afternoon Ramon Cardova Rosado to a vintage Bordeaux such as Baron de Rothchild Haut-Medoc,” he says.